51 24 150 Removing and installing/replacing hydraulic control unit for operating rear lid (electrohydraulic/fully automatic)

WARNING: This page is about a different car, the 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Move rear lid into SERVICE POSITION
Remove LEFT LUGGAGE COMPARTMENT WHEEL ARCH TRIM
Remove sound insulation from inside of wheel arch
Have a cleaning cloth ready for escaping fluid

IMPORTANT: Follow INSTRUCTIONS FOR AUTOMATIC REAR LID ACTUATION (electrohydraulic)

Release screw (1) and nuts (2) on bracket of hydraulic unit (3).

Fig 1: Identifying Hydraulic Unit, Screws And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip hydraulic lines (4) from bracket (5).

Take out hydraulic unit (1).

Disconnect hose coupling (2) (see next picture).

Detach hydraulic lines (4) upwards.

NOTE: If the hydraulic unit is replaced or stays removed for an extended period of time, protect the bores in the hydraulic unit and the hose connections for the hydraulic cylinder against contamination.

If necessary, join hydraulic lines together.

Installation:

CHECK FLUID LEVEL IN HYDRAULIC UNIT , correct if necessary.

To release the hose coupling: slide wire retainer (1)

to right
press wire retainer downwards
detach coupling (2) upwards.

Fig 2: Identifying Hydraulic Lines Of Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 3: Pressing Wire Retainer

Courtesy of BMW OF NORTH AMERICA, INC.